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We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
Maintenance
13
13
Maintenance
z
Switch off the heating system using the main switch.
z
Close the gas shut-off valve.
z
Remove the casing.
13.1 Cleaning the heat exchanger, burner
and condensate trap
z
Dismantle the hot surface ignitor and the ionization
electrode.
z
Loosen the fastening nuts (fig. 37, pos. 1).
z
Remove the earth cable (fig. 37, pos. 2).
z
Remove the retaining plate.
z
Pull the hot surface ignitor (fig. 37, pos. 3) and the
ionization electrode (fig. 37, pos. 4) out of the heat
exchanger.
z
Loosen the threaded connection to the gas control
valve (fig. 38, pos. 1) and pull the plug (fig. 38,
pos. 2) from the gas valve terminal block.
z
Pull the plug from the fan unit (fig. 38, pos. 3).
z
Loosen both sets of retaining clips (fig. 38, pos. 4
and 5) of the burner cover and remove the burner
cover with the fan unit and the gas burner fitting
(fig. 39, pos. 1). Then remove the gas/air distributor
plate (fig. 39, pos. 2), the orifice plate (fig. 39, pos. 3)
and the burner (fig. 39, pos. 4).
z
Clean the gas/air distributor plate, the orifice plate
(GB142-24 and GB142-30 only) and the burner using
compressed air.
Fig. 37
Removing the hot surface ignitor and the ionization
electrode
1
1
4
3
2
CAUTION
To avoid a short circuit.
– Do not spray the cleaning agent onto the
burner, the hot surface ignitor, the
ionization electrode or other electric
components.
Fig. 38
Removing the connections
4
1
4
3
2
5
5
Fig. 39
Cleaning the burner cover, gas/air distributor plate,
orifice plate and burner
1
2
3
4
